Hopefully, we would be OK with regard to securities law if we premine 100% and distribute those coins to users of our app at no cost.
I think so if you can also get many other apps to use your coins and create a huge diverse ecosystem for these tokens (but I don't think you can do that without losing your focus on your app!), but consult your own attorney. Note smooth and others felt premine was culpable. I argued against that. None of us are lawyers.
Again I strongly urge you to realize you are not capable of scaling up an altcoin. Just go read
this thread, so you have some clue about the level of technical issues you are no where near prepared to implement. You should focus on your app and partner with an altcoin that wants to work with apps and scale up many apps. But you are not going to listen to me, so go ahead and learn the hard way. Good luck.
Disclaimer: I am not a lawyer.